Machine for manufacturing book backs



March 3, 1931. A. VIDOR 1,795,187

MACHINE FOR MANUFACTURING BOOK BACKS Filed Jan. 29. 1929 2 Sheets-Sheet 1 Q 11% I Q w 41,521;

INVENTOR. ARMIN VmoR BY I A TTORNEY.

March 3, 1931. vlDOR 1,795,187

MACHINE FOR MANUFACTURING BOOK BACKS Filed Jan. 29. 1929 2 sheets-sheet 2 INVENTOR. ARMIN V\ DOR A TTORNEYS Patented Mar. 3, 1931 UNITED STATES ARMIN 'VIDOR, OF BUDAPEST, HUNGARY MACHINE FOR MANUFACTURING BOOK BACKS Application filed January 29, 1929, Serial No. 335,973, and in Germany December 3, 1927.

This invention relates to a machine for applying covering sheets to the pasteboard backs in the manufacture of bookbacks or covers and for drawing in and forming rounded corners upon said bookbacks and the covers therefor. The bookbacks to which the present invention relates comprise a sheet of relatively heavy pasteboard and a covering sheet of much thinner material,

such as paper for example, though other material may be employed. The thin sheet of paper covers the whole outer face of the pasteboard and its edge portions are folded over and pasted down upon the rear face of the pasteboard. The manner in which this result is accomplished, in a simple, economical and efficient way, will be more fully described in connection with the accompanying drawings, wherein Fig. 1 is a sectional perspective view of the mechanism for folding down and pasting the covering sheets upon the back,

Fig. 2 is a sectional perspective view of an attachment which prevents wrinkling when working upon thin stock,

.Fig. 3 is a sectional perspective view of a mechanism for drawing in and forming rounded corners upon the completed article,

and Fig. 4 is a detail View of an actuating mechanism for the mechanism of Fig. 3.

Referring to the drawing, and more par.-

ticularly to Fig. 1, 1 designates the supporting frame of the machine. A driven shaft 2 actuates a cam-like member 8. A stud 4, carried by a sliding rod 5,'engages in the groove 6, of member 3, and when the shaft 2 is rotated longitudinal reciprocation will be imparted to rod 5 with an appreciable period of dwell at each end of its stroke. The rod 5 is mounted to slide in a guide 7 At its forward end rod 5 carries a cross bar 8, said cross bar, in turn, carrying slides 9 at its outer ends, which slide in guides 10. The slides 9 have hinge leaves 11, pivotally connected thereto at 12, said hinge leaves being secured to a ruler 13. Plates 14 are secured to the slides 9 at their rear ends by removable pins 15, and are secured at their forward ends by screws 16. By removing the pins 15, and'swinging the plates 14 horizontally outward, the ruler may be lifted upon the hinge 12 so that its under side may be cleaned of paste, when required. When in its work ing condition, the ruler is held against upward movement by blocks 17, which are provided with tongues 18-that take into transverse guide grooves'19, formed in the ends of the ruler. Thumb screws 20 normally hold the block 17 in place. The structure described provides means for reciproeating the ruler over the face of the table '21. This table receives the bookba'ok and the pa. per covering. These are placed upon the table with the thin paper projecting outwardly and upwardly withrespect to the pasteboard back, and when the ruler moves forward over the table it folds the paper over upon the rear face of the back. At its limit of forward movement there is an appreciable interval of dwell of the ruler, during which time the-table 21 is forced upwardly against the ruler and momentarily held there to insure the efficient pasting of the paper to the back, it being understood that that face of the paper sheet, which is to contact with the back','has paste applied thereto. The table 21 may be provided with a conventional type of guide, indicated at 21*, against whichv the stock may be positioned. The upward movement of the table so 4 is effected by the rotation of a cam 22, upon a driven shaft 23. In its rotation this cam thrusts upwardly upon a roller 24 that is mounted in the lower end of a stem 25. This stem carries a bracket 26, by which the table I 21 is supported, the bracket being adjustable vertically upon said stem by means of an adjusting nut 28, and being held in its adjusted position by set screws 29. This vertical adjustment of the table provides means for setting the device to accommodate stock of varying degrees of thickness. q It is sometimes the case that if very thin material isbeing operated upon there is a tendency for it to kink up, or wrinkle when the ruler engages it. To prevent such wrinkling I may use the attachmentillustrated in Fig. 2. This isan attachment adapted to be applied to the mechanism of Fig. 1, under certain conditions. It consists of a transverse shaft 30, which carries a pair of rocking arms 31, said shaft being journal-ed in the outer end of brackets 32 that are secured to the machine frame. Arms 33 are mounted upon the cross bar 8 and are frictionally engaged with the rock arms 31 by means of friction clamps 32, consisting of plates that are actuated by springs 33 toward the arms 31. The lower ends of the rocker arms are provided with rubber feet 34, and when the cross arm 3 moves forward the arms 33 act through their frictional engagement with the rock arm 31 to rock the feet 34 downwardly into engagement with the work and hold it against wrinkling. Horizontal pins 36, acting between stop pins 37, limit the throw of the rockarms. V

The structure illustrated in Fig. 3 is intended to form rounded corners upon the .work after the two sheets of material have been pasted together, as above described. In United States Patent 1,646,936, issued to me on October th, 1927, I have disclosed a machine in which a plunger co-operates with an angle forming die much after the manner of the present invention. However, the present invention goes beyond the structure of that patent in certain important particulars, hereinafter set forth.

The structure of Fig. 3 may be used separately from, or in conjunction with, the structure of Fig. 1. When used in conjunction with the structure of Fig. 1, it may rest upon frame 1, and bolts passed through the legs 38 may take into'openings 39, of said frame 1. In Fig. 3 the driven shaft 40 operates through a grooved cam 41, like cam 3, to impart reciprocation to bar 42. The forward end of this bar is secured to'a slide 43. This slide carries a block 44 through the medium of an angle die slide plate 45, said slide plate 45 being pivoted in ears 46 of the slide 43, and being movable over a table 47 in much the same manner that the ruler is movable over the table in Fig. 1. The table 47 is spring supported upon springs 48, which surround pins 48 carried by the table and which pins slide through openings 48 formed in a base plate 49, of the frame 50. The block 44 carriesa guide 51,in which a cylinder 52 is slidablydisposed. The lower end of this cylinder terminates in the male angle die 53, which co operates with the female angle die 45 to form a rounded corner upon the stock at 54, as will be presently set forth. A plunger 55 is proj ected by a spring 56 below the lower face of the die 53, and if thecylinder be forced bodily downward, and if the corner of the stock be placed in position slightly overlapping the rounded portion 54, with the straight side of the stock against the guide surface X of the angle die, initial downward movement of the cylinder will cause the plunger to engage the stock and force it down into the die, turning the corner up. Continued downward movement of the plunger will then cause the die 53 to turn the corner over and flatten it and bring it to an evenly rounded and securely pasted condition. The manner of thus forming rounded corners upon paper book-backs, and the like, has been made the subject matter of the patent issued to me on October 25th, 1927, No. 1,646,986. Downward movement of the cylinder and plunger is effected through the medium of a bail like element 57, the terminal ends of which are engaged with rock arms 58. Said rock arms are, in turn, moved upon their pivots 59 by means of the cam-like actuating member 60, upon shaft 61. The female angle die plate 45 is guided in its travel by overhanging guide blocks 62, and these guide blocks are, in turn, held in position by set screws 63, which pass through slots 64. By loosening the set screws the guide blocks may be moved outwardly to free the angle plate 45, and permit it to be thrown upwardly upon its hinge 46, for the purpose of cleaning the under face of the same. A stop-plate is arranged beneath the table 47 and limits the spring control downward movement of the table, said stop being adjustable in height, since it comprises two pieces, one screwed into therother. When the plunger descends and forces the work down into the angle die 45, it not only draws a round corner upon the work, and turns said corner over and pastes the same, as described, but it also forces the table downwardly against the action of the spring to such an extent that the upper surface of the work is in line with the lower surface of the die 45, whereupon the slide plate moves bodily forward under thrust of the bar 42, carrying the plunger and associated parts with it,'and rubs over the drawn-in corner to bring about a secure and reliable pasting of the same. The movement of the mechanism then withdraws the slide plate and plunger so that the finished article may be removed, and a new piece of work maybe laid on the slide plate or another corner of the same piece of work may be laid thereon, to repeat the operation. Inasmuch as the move ment of the angle die 45 is such that there is a dwell at its limits of movement, the interchanging of the completed and new pieces of work may be conveniently accomplished. By adjusting the stop 65, the descent of the spring held table may be fitted to the thickness of the material beingoperated upon. To change the plunger 52 and its associated parts, it is only necessary to remove the guide 51 from block 44 after releasing set pin 51. Any suitable means may be employed for driving the several shafts, it being common practice in the art to provide a single electric motor for driving mechanisms of this character simultaneously or independently.

It is to be understood that the invention is not limited'to the particular form of'driving mechanism shown, since other mechanical appliances may be used to secure the desired movements. Furthermore, the rulers and plungers may be duplicated, at will, to give a machine of any desired capacity, without departing from the invention.

While I have shown a plurality of feet 34, in Fig. 2, a continuous strip may be employed at this point, or any desired number of grippers maybe mounted upon the shaft 30. The arrangement shown in Fig. 2 has the advantage that the engagement of the arms 33 with the rock arms 31 is a frictional one, so that the rock arms are moved upon initial movement of the arms 33 until they contact with the work, after which the arms 33 continue their movement without further movement of the rock arms 31, thus pauses are provided for the work of the ruler, on the one hand, and for the change of work, on the other hand.

Having described my invention, what I claim 1s:

,1. A device of the character described, comprising a longitudinally movable slide, means for imparting reciprocation thereto, a ruler mounted for bodily upward swinging movement with respect thereto, and a table over which said ruler moves in a direction transverse to its length.

2. A structure of the character described, 7

comprising a slide, a ruler hinged to said slide, plates for holding the ruler in rigid relation to the slide, a table over which the ruler slides, and guide means engaging the ends of the ruler.

3. A device of the character described, comprising a table, a ruler movable thereover, a gripping element for holding work upon the table, and means moving with the I ruler for actuating said gripping element to holding position.

4. A structure as recited in claim 3, wherein the engagement between said means and gripping element is a frictional one.

5. A device of the character described, comprising a ruler, means for imparting motion to said ruler in a direction transverse of its length, a table serving to receive a bookback and a covering to be wrapped thereon, means for imparting bodily movement to the table to press it toward the under side of the ruler, the means for imparting movement to the ruler comprising a reciprocating element and quickly releasable connections between said ruler and said reciprocating element.

In testimony whereof I affix my signature.

ARMIN VIDOR. 

